The present creation provides a hydrogel patch for oxter comprising: (a) a polyurethane film layer (b) a pressure-sensitive gel layer (c) a meltblown nonwoven (d) a hydrogel and (e) a cross-linked network polymer, wherein the polyurethane film layer and the pressure-sensitive gel layer are in a biconcave shape to let the hydrogel patch capable of fitting oxters.本創作提供一種腋下用水凝膠貼片,其包含:(a)一聚氨酯膜層;(b)一感壓膠層;(c)一熔噴型不織布;(d)一水凝膠;及(e)一網狀交錯聚合物,其中該聚氨酯膜層與該感壓膠層為雙凹形以使該腋下用水凝膠貼片能夠貼合於腋下。100‧‧‧腋下用水凝膠貼片106‧‧‧外層107‧‧‧內層201‧‧‧腋下202‧‧‧上臂203‧‧‧胸側